L = int(input())
N = int(input())
W = list(map(int, input().split()))

W.sort()

sum_W = 0

itr = 0

for i in range(N):
    a = sum_W + W[i]
    if a <= L:
        sum_W = a
        itr = i + 1
    else:
        break

print(itr)